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## HDFS fs命令 (DFS-->Distributed File System) | ||
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### 一、命令 | ||
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-help [cmd] //显示命令的帮助信息 | ||
-ls(r) <path> //显示当前目录下所有文件 | ||
-du(s) <path> //显示目录中所有文件大小 | ||
-count[-q] <path> //显示目录中文件数量 | ||
-mv <src> <dst> //移动多个文件到目标目录 | ||
-cp <src> <dst> //复制多个文件到目标目录 | ||
-rm(r) //删除文件(夹) | ||
-put <localsrc> <dst> //本地文件复制到hdfs | ||
-copyFromLocal //同put | ||
-moveFromLocal //从本地文件移动到hdfs | ||
-get [-ignoreCrc] <src> <localdst> //复制文件到本地,可以忽略crc校验 | ||
-getmerge <src> <localdst> //将源目录中的所有文件排序合并到一个文件中 | ||
-cat <src> //在终端显示文件内容 | ||
-text <src> //在终端显示文件内容 | ||
-copyToLocal [-ignoreCrc] <src> <localdst> //复制到本地 | ||
-moveToLocal <src> <localdst> | ||
-mkdir <path> //创建文件夹 | ||
-touchz <path> //创建一个空文件 | ||
### 二、HDFS的Shell命令练习 | ||
# cd /mnt/softWare/hadoop-2.2.0/sbin/ | ||
# ./start-dfs.sh | ||
# hdfs dfs -ls / (或hadoop fs -ls /) 查看HDFS根目录 | ||
# hdfs dfs -mkdir /test 在根目录创建一个目录test | ||
# hdfs dfs -mkdir /test1 在根目录创建一个目录test1 | ||
#hadoop fs -put ./test.txt /test 将根目录下test.txt文件上传到/test下 | ||
或#hadoop fs -copyFromLocal ./test.txt /test | ||
#hadoop fs -get /test/test.txt . 将/test目录下的test.txt文件下载到当前目录 | ||
或#hadoop fs -getToLocal /test/test.txt . | ||
#hadoop fs -cp /test/test.txt /test1 | ||
#hadoop fs -rm /test1/test.txt | ||
#hadoop fs -mv /test/test.txt /test1 | ||
#hadoop fs -rmr /test1 |